Multiple-frequency ultrasonic distance measurement using direct digital frequency synthesizers

Huang, K. N.; Huang, Yu-Pei

doi:10.1016/j.sna.2008.09.014

Cited by 42 publications

(28 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Both the sum and product of the correlations for two signals showed a 40% reduction [17] in standard deviation with respect to the system with one signal emitted [9], [1] The novel single-head system for correlation-based ultrasound distance measurement [9] was adjusted to improve its effectiveness and precision: a two-head system was built.…”

Section: Distance Measurement Standard Deviationmentioning

confidence: 99%

A Novel Three-Head Ultrasonic System for Distance Measurements Based on the Correlation Method

Gądek

Dudzik

Stręk

2014

Measurement Science Review

View full text Add to dashboard Cite

A novel double-emitter ultrasonic system for distance measurements based on the correlation method is presented. The proposed distance measurement method may be particularly useful in difficult conditions, e.g. for media parameters undergoing fast changes or in cases when obstacles and mechanical interference produce false reflections. The system is a development of a previously studied single-head idea. The present article covers a comparison of the two systems in terms of efficiency and precision. Experimental research described in this paper indicated that adding the second head improved the measurement exactness -standard deviation decreased by 40%. The correlation method is also described in detail, also giving the criterion for the quality of the measurement signal.

show abstract

Section: Distance Measurement Standard Deviationmentioning

confidence: 99%

A Novel Three-Head Ultrasonic System for Distance Measurements Based on the Correlation Method

Gądek

Dudzik

Stręk

2014

Measurement Science Review

View full text Add to dashboard Cite

show abstract

“…However the maximum range that can be estimated using this technique alone is limited to one wavelength of the carrier frequency which means that at 40 KHz the maximum range is limited to 8.575 mm assuming a sound velocity of 343 m/s. Multi-frequency continuous wave phase shifts [13], [14] was used to increase range by using the difference in phase between frequencies (∆θ) and the difference in frequencies (∆F) . However the maximum range is still limited to (C/∆F) where C is the sound velocity.…”

Section: Related Workmentioning

confidence: 99%

“…Many ultrasonic range measurement methods have been proposed in the literature [12][13][14][15][16][17][18][19]. Time of Flight (TOF) and phase shift methods are used in most ultrasonic range measurement systems.…”

mentioning

confidence: 99%

Robust High-Accuracy Ultrasonic Range Measurement System

Saad

Bleakley

Dobson

2011

IEEE Trans. Instrum. Meas.

View full text Add to dashboard Cite

“…One of the innovative methods for defining the temporary propagation delay of the ultrasound is the search method of zeros of a signal [10].…”

Section: Introductionmentioning

confidence: 99%

Inaccuracy of acoustic measurements in dual-frequence method of sounding

2018

View full text Add to dashboard Cite

Abstract. The article describes the new method of defining time coordinate of the moment when echo-impulse comes. The principle of the method consists in consecutive sounding of the (head) well with the signals of different frequencies and analysing the received reflected signals. The article shows the graphs with dependence of measurement inaccuracy when the operating threshold of the comparator for different ratios of frequencies changes. If the comparator works out in different (in order) periods of the received signals then measurement inaccuracy will be 1-2 periods of the carrier frequency.

show abstract

Multiple-frequency ultrasonic distance measurement using direct digital frequency synthesizers

Cited by 42 publications

References 14 publications

A Novel Three-Head Ultrasonic System for Distance Measurements Based on the Correlation Method

A Novel Three-Head Ultrasonic System for Distance Measurements Based on the Correlation Method

Robust High-Accuracy Ultrasonic Range Measurement System

Inaccuracy of acoustic measurements in dual-frequence method of sounding

Contact Info

Product

Resources

About